1. Webster’s Encyclopedic Dictionary,1988
2. A historical view of the definition and classification of the cerebral palsies,1984
3. Cerebral palsy;MacKeith;Lancet,1958
4. Cerebral palsy;Kuban;N Engl J Med,1994
5. Etiologic yield of cerebral palsy;Shevell;Pediatr Neurol,2003